First Dark Sky
Witch Head Nebula
© 2019 Klaus Brasch
The Witch Head Nebula is extremely faint nebula and I wonder if anyone has ever actually seen it in a large aperture telescope, possibly with a narrow band filter? This image is a blend of several exposures taken with a TMB-92 refractor a couple of year ago and more recent images taken with an AP-155 at f/5.2, at with a Hutech modified Canon 6D and 6DMark II, respectively, shooting at ISO 6,400 and through an IDAS LPS-V4 filter. Cumulative exposure is about 30 minutes.
IC 2118 (also known as Witch Head Nebula due to its shape) is an extremely faint reflection nebula believed to be an ancient supernova remnant or gas cloud illuminated by nearby supergiant star Rigel in Orion. It lies in the Eridanus constellation, about 900 light-years from Earth. The nature of the dust particles, reflecting blue light better than red, is a factor in giving the Witch Head its blue color. Radio observations show substantial carbon monoxide emission throughout parts of IC 2118, an indicator of the presence of molecular clouds and star formation in the nebula. In fact candidates for pre-main sequence stars and some classic T-Tauri stars have been found deep within the nebula.
Find the full details at https://en.wikipedia.org/wiki/IC_2118